add different nextButtonProps for each Dialog in MultistepDialog

[Kaby-Lake]

Question

I have a MultistepDialog with several sub-dialogs in it, and I want to custom each dialog with different code to define if the nextButton should be disabled or not. For now, the only API nextButtonProps can just set the global Props for all nextButtons.

something like this

[adidahiya]

I think we should have an API that accepts a callback for each step:

type AllowedButtonProps = Pick<IButtonProps, "disabled" | "text">;

export interface IMultistepDialogProps extends IDialogProps {
    /**
     * Props for the back button.
     */
    backButtonProps?: Partial<AllowedButtonProps> | (step: DialogStepId) => Partial<AllowedButtonProps>;

    /**
     * Props for the next button.
     */
    nextButtonProps?: Partial<AllowedButtonProps> | (step: DialogStepId) => Partial<AllowedButtonProps>;

    // ...
}

open to PRs for the above change... or I will get to it some time in April